@Mina.G Hey I am tagging you in my explanation. I ended up immediately crossing A off because of the sufficient and necessary mistake and B. Once you see the chain you can see why A is incorrect quickly.

In learning skills here is how I diagrammed this

1. Price for coffee beans increase ----> Coffee shop increase price

2. Coffee Increase Price ---> Selling non coffee or coffee decrease in sales

3. Sell non coffee products---> Decrease overall profitability

4. Avoid decrease in overall profit---> Coffee sales do not decrease

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Some conditionals we can chain together here:

We know that the price for coffee beans will increase if the price for coffee increases...so lets chain this

Price for coffee beans increases ---> Coffee Shop Increases Price

In our initial assessment, we see the coffee increase is linked to the second set so we can just make those one chain

So now we have

Price for coffee beans increases ---> Coffee Shop Increases Price---> selling non-coffee or coffee sales decrease

Now lets pause :

Based on our premise, we know that if they sell non coffee products, then their overall profit will decrease

So now we have

Price for coffee beans increases ---> Coffee Shop Increases Price---> selling non-coffee (overall decrease in profitability) or coffee sales decrease

Now that we have this, the sentence is still not as clear as we would like it to be. When this happens, we can negate certain premises to make it make sense.

So I am going to negate #4

Avoid decrease in overall profit---> Coffee sales do not decrease

/coffee sales do not decrease ---/ avoid decrease in overall profit

This negation literally says : If coffee sales decrease then we can not avoid a decrease in overall profit

Essentially, Coffee sales decrease = Decrease in profit

Now that we have that we are going to substitute (coffee sales decrease for a decrease in profit just like selling non coffee products)

Price for coffee beans increases ---> Coffee Shop Increases Price---> selling non-coffee (overall decrease in profitability) or coffee sales decrease (overall decrease in profitability)

FINALLY

We now have

Price for coffee beans increases -> Coffee Shop Price Increase -> Decrease in overall Profitability

Now lets look through our answer choices

A. Right off the bat "IF" the decrease in overall profit (Pause) we have established that this is a necessary condition. This is incorrect.

B. Same reason for A

C. Okay this statement is saying if the price it pays for coffee beans continues to increase -> The shops overall profit will decrease (THIS CHAINS CORRECTLY)

D. We do not know what it would take to decrease the proce of coffee beans the STIM does not say so no.

E. The stimulus says nothing about what would be sufficient for coffee sales to increase.

There we have it!

This was not a good way to explain it but the show goes on

Guys do not worry, Most = more than half.. the stem is saying "more than half (most) got B minus or higher" dont over think it. The reason that C is wrong is because it excludes B- and we know nothing about "B" scorers in itself because the stem only mentions B-... just paying attention to verbiage helps .